Consider the following statements and determine which are true and which are fal
ID: 950586 • Letter: C
Question
Consider the following statements and determine which are true and which are false.
true false The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:
(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in the molecule)
true false NO3- has only two resonance Lewis structures.
true false Silane (SiH4) is a non-polar molecule.
true false Bond angles for IF6+ are 90 °.
true false KrF4 has a tetrahedral structure.
true false Selenium tetrafluoride (SeF4) is a non-polar molecule.
Explanation / Answer
1. true false The formal oxidation state of an atom in a molecule (or molecular ion) can be calculated as:
(the number of valence electrons on a free atom) minus (half the number of electrons in bonds to that atom) minus (the number of unshared electrons assigned to the atom in the molecule)
is true this is the general formula for the formal oxidation state
2.
NO3- has only two resonance Lewis structures is false because it is having three resonence structures
3.
Silane (SiH4) is a non-polar molecule is true cecause shape is tetrahedrol all groups are same
4.
Bond angles for IF6+ are 90 ° is true
because it is in octahedral shape two anglels will bethere one is 180 and another is 90
5.
KrF4 has a tetrahedral structure is false because its shape is square planar
6.
Selenium tetrafluoride (SeF4) is a non-polar molecule is false
because its shape is seaswa non polar in narure